linux-kernel - [PATCH for-5.5] io_uring: make HARDLINK imply LINK

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Message-Id: <4d08ae851e48c030b726e00def4451466475b7e9.1576605351.git.asml.silence@gmail.com>
Date:   Tue, 17 Dec 2019 20:57:05 +0300
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH for-5.5] io_uring: make HARDLINK imply LINK

The rules are as follows, if IOSQE_IO_HARDLINK is specified, then it's a
link and there is no need in IOSQE_IO_LINK, though it could be there.
Add proper check.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 339b57aac5ca..eb6d897ea087 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3577,7 +3577,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
 		 * If previous wasn't linked and we have a linked command,
 		 * that's the end of the chain. Submit the previous link.
 		 */
-		if (!(sqe_flags & IOSQE_IO_LINK) && link) {
+		if (!(sqe_flags & (IOSQE_IO_LINK|IOSQE_IO_HARDLINK)) && link) {
 			io_queue_link_head(link);
 			link = NULL;
 		}
-- 
2.24.0